Furnace.



PA'IIBNTEDOGT 20, 1903.

G. J. MONPOR-T.

FURNACE. APPLICATION FILED JAN. 15, 1902.

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UNITED STATES PATENT Patented October 20, 1903.

FFICE.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 741,812, dated October 20, 1903..

Application filed January 15, 1903. Serial No. 139,105. (No model.)

To all whom it may concern: Be it known that 1, CHARLES J. MONFORT, a citizen of the United States of America, and

a resident of St. Paul, in the county of Ramsoy and State of Minnesota, have invented certain new and useful Improvements in Furnaces,of which the following is a specification.

My invention relates to improvements in furnaces, and has for its object to provide means for reducing the amount of air entering the furnace over the grate during the operation of firing and to increase the efficicncy of the fire. V

A further object is to facilitate efficient work by the fireman.

To these ends my invention consists, in combination with a fire-door on a boilerfront, of an opening in said door which is adapted to permit the use of a coking-iron in the furnace when said door is closed and means for opening and closing said door.

My invention further consists of the ele ments, features of construction, and combination of parts hereinafter more particularly described and claimed.

In the accompanying drawings, forming part of this specification, Figure l is a detail sectional side elevation of the front of a stationary boiler, showing my improvement. Fig. 2 is a front elevation of Fig. 1. Fig. 3 is a perspective view of the coking-iron; and Fig. 4 is another view of the coking-iron, shown partly in section.

In the drawings let A represent the boilerfurnace, B the boiler-front, and O the coking-iron, which is shown in connection with said boiler-front. The fire-door 2 is pivoted at 3 on the door-frame 4 and slotted at 12 for receiving the handle 7 of the coking-iron C. The door-frame is also slotted at 11 for the handle, so that the coking-iron can be used when the door is closed.

The coking-iron, as shown, consists of the head 5, which is perforated at 6. The handle 7 is pivoted at 8 to the lugs 9 on the back of said head. The end of the handle adjoining the pivot is provided with stop-shoulders 9 and 10, which are adapted to limit the movement of said head. In use the coking-iron is placed in the door-frame, as shown in Fig. 1,.

tions 6 in the head 5 form vents for the gases which are formed by the coal when coking.

As shown, the fire-door is provided with mechanism D, which is used for openingand automatically closing said door. This mechanism consists of the shaft 13, which is journaled at 1 1 above the door 2. A pair of lever-arms of different lengths and arranged at an angle approximately forty-five degrees to each other radiate from said shaft, as shown in Fig. 1. The lower arm 15 is directly over the door, and its outer end is attached to the lug 16 and through the perforation 17 by means of the link 18. A cable19 is attached to the outlet arm 15 and passes around the pulley 20. This cable carries the counterweight 21 for the door. The pulley is journaled on the supports 22, which are bolted at 23 to the boiler-front. A second cable 25 passes around the wheels 27 and 28 and connects with the upturned end 29 of the footlever E. The wheels 27 and 28 are journaled on the supports 30, which are bolted at 31 to the boiler-front. The position of the wheel 27 is immediately above the lever 24, and that of the wheel 28 is opposite the arc described by the upturned end of the footlever. The foot-lever is pivoted at 32 on the supports 33, which are bolted at 34: to the floor in front of said boiler-front. In use the operating end 35 of the foot-lever is depressed and the door heldopen. Coal is shoveled in front of the coking-iron, and the foot-lever is then released and the door closes. After the coal has coked sufficiently the handle 7 is raised through the slots 11 and 12 and the coal pushed back over the fire.

It is obvious that by the use of the mechanism above described the amount of air ontering the furnace over the grate during the operation of firing and coking the coal is re duced to a minimum.

Having described my invention, what I claim as new, and desire to protect by Letters Patent, is-

1. A device of the class set forth, consisting in combination, with a furnace, of a doorframe, a door closing said frame, a cokingiron, and a handle on said coking-iron; said frame and door being slotted to receive said handle, and permit the use of said cokingiron in said furnace when said door is closed.

2. A device of the class set forth, consisting, in combination with a furnace-front, of

a door hung upon said front, a coking-iron,a

handle on said coking-iron, and means for permitting said handle to be raised or lowered and said iron to be thrust into said furnace when said door is closed.

3. A device of the class set forth, consisting of a furnace, a fire-door, a slot in said door, a coking-iron, and a handle on said iron; said slot being adapted to admit said handle when said door is closed.

4. In combination with a furnace, a furnace-front, a door on said front, foot-lever mechanism for opening said door, a cokingiron in said furnace, a handle on said iron, and an opening in said door adapted to receive the handle on said coking-iron.

5. A device of the class set forth, consisting, in combination with a furnace, ofa doorframe, a door closing said frame, a cokingiron adapted to be used in said furnace, and a handle on said iron; one of said furnace parts being perforated to admit said handle when said door is closed so that said iron may be used in said furnace.

6. In combination with a furnace-door, a coking-iron consisting of a head and a handle pivotally attached to said head, and means by which said head and its handle are freely disposed in said furnace when said door is closed. v

7. A device of the class set forth, consisting, in combination with a furnace-front, of a door hung upon said front and adapted to swing out, a coking-iron, a handle on said iron, a perforation in one of said furnace parts for receiving said handle, a shaft journaled above said door, a pair of lever elements carried by said shaft, a connection between one of said elements and the swinging end of said door, a foot-lever adjoining the furnacefront, and a second connection between the second lever element and said foot-lever.

8. A device of the class set forth, consisting, in combination with a furnace-front, of a d'oorhung upon said front, a coking-iron, a handle pivotally attached to said iron, a slot in said furnace-front, a door for receiving said handle, a shaft journaled above said door, a pair of lever elements carried by said shaft, a connection between one of said elements and the swinging end of said door, a foot-lever adjoining the furnace-front, and a second connection between the second lever element and said foot-lever.

9. A device of the class set forth, consisting, in combination with a furnace, ofa doorframe, a door closing said frame, a perforation in said furnace parts, and a coking-iron consisting of. a head and a handle pivotally attached to said head; said perforation being adapted to receive said handle, for the purposes specified.

10. In combination with a furnace, a furnace-front, a fire-door on said front, a slot in said fire-door, and a coking-iron consisting of a head, a handle pivotally attached to said head, and stops by which the movement of said head is limited; said slot being adapted to admit said handle and permit the use of said coking-iron in said furnace when said door is closed.

, In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES J. MONFORT.

WVitnesses:

E. M. BoEsEL, F. G; BRADBURY. 

